a) The signal to noise ratio of a measured signal is quoted as 54dB. The rms noi
ID: 2291762 • Letter: A
Question
a) The signal to noise ratio of a measured signal is quoted as 54dB. The rms noise voltage is 0.3mV. Calculate the rms signal voltage [5] State a possible use in instrumentation for the circuit shown below in Figure Q6b and determine its bandwidth. b) 0.53 ?F V, out Figure Q6b c) A voltage of 1.45V is applied to the input of 8-bit analogue to digital converter with a 5V reference voltage. What will be the bit pattern on the 8 lines of the ADC? Briefly describe how a strain gauge may be used to measure acceleration. Use a schematic diagram if needed. d) The signal from a piezoelectric accelerometer is usually passed through a charge amplifier. What is the role of the charge amplifier? e)Explanation / Answer
1(d) Strain gauge accelerometer
The main parts of a strain gague accelerometer are as follows:
Operation of Strain Gauge Accelerometer
(e) A charge amplifier is an electronic high impedance conversion device which simplifies the use of high impedance charge accelerometers as well as other high impedance devices
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